11 Pa.C.S. § 12443: Ratification and validation of real estate sales.

(a) Ratification and validation.--A deed conveying title to real estate or interests in real estate from a city to any other party is valid and conveys the property and interests described in the deed in accordance with the terms of the deed if:

(1) the deed is executed and delivered pursuant to an ordinance or resolution of council; and

(2) the deed is not contested by an action filed in the court of common pleas of the county in which the city is located within six years of the date the deed is recorded.

(b) Incontestability.--A deed shall not, after the time period specified in subsection (a), be subject to attack in any court, agency or proceeding.